I have a 30ft enclosed 8ft high box double axle. Hooked to gmc 2500 crew cab. Took it across the truck scales fully loaded , cars, golf cart, passengers, coolers etc. 17,900 lbs. need advice on best away control and brake controller. I was looking at the prodigy p2. Also I know there is a difference between sway control kits and weight distribution bars. Any advice or options on keeping this rig in one lane is appreciated. Also I have air lift air bags on the truck so it rides 100% level. Thanks guys!